While on the base leg for his private grass airstrip, the pilot noticed he was high, so he added flaps to increase his descent rate. On final, the airspeed was a little fast and during the landing, he flared the airplane a little high. After touchdown, the pilot applied the brakes, but the airplane did not respond, so he applied a little more brake. The airplane nosed over and came to rest inverted, sustaining substantial damage to both wings and the empennage. The pilot reported he should have performed a go-around instead of attempting to salvage the landing.